Improvement in pump-regulating valves



2 Sheets-Sheet 1.

J. H. BLESSING. Pump Regulating Valve.

No. 207,483. Patentedv Aug. 27,1878.

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2 Sheets-#Sheet J. H. BLESSING. Pump Regulating Valve.

No. 207,483. Patented Aug. 27,1878.

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UNTTED STATES PATENT OFFICE.

I JAMES H. BLESSING, OF ALBANY, NEW YORK.

IMPROVEMENT IN PUMP---REGULATING VALVES.

Specification forming part of Letters Patent No. 207,483, dated August 27, 1878; application filed February 16, 1878.

To all Iwhom 'it ma-z/ concern:

Be it known that I, J AMES H. BLESSING, of,

the city of Alban y, county of Albany, and State of New York, have invented a new and useful Improvement inv Pump-Regulating Valves, 0f

which the following is a full, true, and exact description, reference being had to the accompanying drawings. i

I have heretofore led au application for a simlar invention on the 15th day of January, 187

The object. ot my invention is to regulate the action of a boiler feed-pump vby means of the quantity of water which is fed to such pump, so that said pump will only operate when supplied with water, and will practically cease to operate when the watersupply is stopped. i

My invention is particularly useful in feedwater pumps which return to steam-boilers the water of condensation from heating-coils in buildings.

It is customary, in buildings which are not provided with an automatic return, to allow the water from the coils to drain into a tank, from which tank it is forced back to the boiler by means of a force-pump; and it has heretofore required the presence of auengineer to regulate said pump, since, the ow of the' return-water being a variable one, if the throttle-valve of the pump were set at any particular point-zit might follow that, owing to the decrease in the supply of the return-water, the pump would exhaust such return-tank, and, having no water tov act upon, would attain a great velocity, and thereby destroy itself. It has therefore been customary to stop the pump to allow water to return into the tank from the coils, and then at intervals to operate the pump and return all the drain-water into the boiler, and then to stop the pump until its next operation. l y

My contrivance is intended to accomplish this result automatically, and I use the returnwater itself as a means of regulating the speed of the pump, so that the pump will only operate when supplied with water, and will stop, or practically stop, when the supply ceases. I thereby dispense with the attendance of a controlling engineeuand render the apparatus entirely automatic.

In the apparatus described in my previous application I have made use of a diaphragm to regulate the supply of steam. In my present application I make use'ot an opentop iioat, which iioat'controls a steam-regulatin g valve, which admits the steam to a feed-pump. B y this means I avoid the use of a diaphragm, which is in some cases objectionable.

My invention is clearly shown in the accom panying drawings, in which similar letters refer to similar parts.

Figure 1 represents a cross-section of my apparatus, showing the steam-regulating val ve- V open. Fig. 2 represents a cross-section of the same, showing the said valve closed.

My invention consists of an outer containing-vessel, B, set on the pedestal A., which containing-vessel serves as a support for the operating parts of :my machine. Within the vase-shaped vessel B is the open-top float W, which is supported on the stud S, sliding in the tube T. This tube is continued by the solid rodIt, andpasses through the top of the vessel. Attached to the upper end of the rod .It is the balancedvalve V, which is what is known as a double piston valve,4 and is clearly shown in the drawings.

Connected with the vessel I3 are the inletl and outlet pipes P and I. The pipe P conimunicates with the water-supply. The pipe II communicates with the force-pump, and water is supplied to such pump through thc pipe P only.

- The pipe I has an oriiice, c, so situated that water entering it iirst lls the annular space s between the open-top iioat W and the vessel B. The pipe P is connected with the siphon Il, near the bottom of the open-top iioat W.

The valveV serves to close the double seat, which is clearly shown. The rod It', operated by the wheel W', bears against the upper end ot' the rod It, and thereby prevents the closing of the valve V under certain circumstances, .as will be presently described.

The operation of my machine can now be understood. XVa-tcr entcrin g the apparatus by the pipe P first iills the annular space s, as shown in Fig. 2. This causes the iioat NV to ,rise and to close the valve V, as shown in Fig. 2. If water continues to enter by the pipe I),

then it will overiow into the ioat W and cause the same to sink. In sinking, it opens the valve V, and allows steam to pass through the pipes M and M', as is indicated by the arrows. .lhis steam causes the pump to operate,

and the pump draws the water from the opentop iioat W by means ofthe siphon H and delivery-pipe P', as shown by the arrow. If', now, sufficient water continues to enter the iioat V to supply the demand occasioned by the operation of the pump, then said pump will continue to operate by reason of the valve V being open', as shown in Fig. l; but in case the demand is greater than the supply, then the iloat WV will rise and begin .to close the valve V, thereby slowing down the pump and decreasing the demand; and if the water-supply should cease altogether, then the oat would once more "ise, asshown in Fig. 2, and close the-valve V.

The purpose of the rod It is to prevent, under certain circumstances, the absolute closing` of the valve V. In direct-actin g pumps this contrivance would not be required, since such pumps start of themselves on the admission of steam; but in crank-pumps it is desirable,

l because such pumps, it once stopped, have to be started by hand. If yonce stopped, such pumps would come to rest, and the opening of the valve V would not again start them.

B y means of the hand-wheel W', I adjust the point ot' the rod R to such a position as to keep the valve open, even when the vessel W is empty and is floated by the water in the space s. It is desirable in crank-pumps to keep this valve just sufficiently open to allow the pump to run very slowly,even when there is no water in the vessel W.

It will be seen that by means of this apparatus the water-supply of a pump regulates exactly its action, so that if more water be supplied the pump will operate faster; if less water be supplied the pump will operate slower and if no Water be returned the pump will stop entirely, unless it is desirable to keep it in slow operation.

What I claim as my invention, and desire to secure by. Letters Patent, is-' 1. An apparatus for controlling the steamsupply of a pump by means of the water supplied to the same, which consists of a rising and falling float connected to a regulating' steam-valve, constructed and arranged for operation' substantially as described. A

2. An apparatus for regulating the stea1nsupply of a pump by means of the water supplied to the same, which consists of a rising and falling open-top oat, into which the rct-urn-water enters, and from which it is drawn by means of a siphon, constructed and arranged for operation substantially as described.

3. In an apparatus for regulating the steamsupply of a pump by the water supplied to the same, a iioat controlling the steam-valve ot' the pump, substantially as described.

JAMES H. BLESSING.

Witnesses:

S. F. SULLIVAN, WM. J. SAWYEP.. 

